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6B11
Thermocouple Inputs: mV/Volt Inputs: Current Input: Signal Conditioning Module
Isolated, Field Configurable Analog Input Rev. 0
FEATURES
Single-channel isolated signal-conditioning modules.
Accepts outputs from Thermocouple, millivolt, volt and
current signals.
Complete microcomputer-based data acquisition systems.
Can be remotely reconfigured for various sensor types and
input ranges.
APPLICATIONS
Process Monitoring & Control
Test Stand Automation
Machine Monitoring
Material Testing
Remote Energy Mangement
Laboratory Data Acquisition
PRODUCT OVERVIEW The 6B Series delivers sensor-to-host signal-conditioning for
remote applications. Software-configurable for a wide variety of
sensor types, including: analog input, analog output, and digital
I/O, the 6B Series is intended for remote data acquisition,
machine monitoring, remote energy management and process
monitoring and control applications.
Including transformer-based isolation, ranging, linearization,
A/d conversion and RS-232C/RS-485 serial communication for
up to 256 channels per serial port, the 6B Series modules and
boards are a complete, low-cost interface between computers
and analog signals.
All 6B Series input/output modules are fully encapsulated and
identical in pin-out and size, facilitating their ability to be mixed
and matched with all other 6B Series modules on the same
backplane. The 6B Series is fully rated over the industrial
temperature range of -25oC to +85oC.
Each 6B Series module and board is a complete
microcontroller-based process monitoring and control system,
with all calibration, address and linearizing parameters stored in
non-volatile memory. Being microcontroller-based, 6b Series
modules can be configured for various sensor types, including
RTD and thermocouple, and a wide variety of input ranges. This
reduces the number of different modules that need to be used
in a given application and carried in inventory.
FUNCTIONAL BLOCK DIAGRAM Figure 1. 6B11 & 6B11HV Functional Block Diagram
Designed for industrial applications, the 6B Series modules
incorporate transformer-based isolation with surface-mount
manufacturing technology – providing increased reliability at
low cost. The compact, rugged 6B Series analog modules can be
mixed and matched on a 16-channel backplane for high density,
remote process monitoring and control.
Communications between backplanes, modules and host is in
ASCII over an RS-232C link or RS-485 bi-directional serial bus.
Circuitry to convert RS-232C to RS485 is built into the 6B
backplane. Baud rates are software programmable, with speeds
up to 19.2 K Baud.
The 6B Series digital subsystem communication is compatible
with the overall 6B Series communication protocol. Each digital
I/O board can be configured for its address, baud rate and
checksum status. Connection to the 16 and 24-channel solid
state relay backplanes is by a 50-conductor ribbon cable. This
enables interfacing with input and outputs from 4 V to 240 V.
Power control modules are also available that can switch up to
3A and come with a variety of ratings for low voltage DC up to
280 VAC.
GENERAL DESCRIPTION The 6B11 and 6B11HV are single-channel isolated signal-
conditioning modules which accept the outputs from
thermocouple, milli-volt, voltage, and process current signals.
Unlike conventional signal conditioners, the 6B11 and 6B11HV
are complete microcomputer-based data acquisition systems. A
major advantage of the onboard microcontroller is its ability to
be remotely reconfigured for various sensor types and input
ranges.
Synchronized Sampling – The synchronized sampling
command allows data to be sampled simultaneously from all
6B11, 6B11HV, 6B12, 6B12HV modules and all 6B50 boards in a
6B Series system. Each module or board stores the data in a
separate register within its microcontroller and can access the
data with a separate command.
Software Configuration – The 6B11 and 6B11HV linearize and
compensate J, K, T, E, R, S and B thermocouples. Additionally,
these modules also digitize milli-volt and voltage ranges from
Software is used to configure the 6B11 and 6B11HV modules
for address, input range, baud rae, data format, checksum status
and integration time. All programmable parameters are stored
in the nonvolatile memory of the module.
Each analog input signal is conditioned and scaled by a
programmable-gain amplifier and digitized by a 16-bit
integrating converter under microprocessor control. The
digitized value is passed serially across a magnetically isolated
barrier (1500 V rms – Model 6B11, 2500 V rms – Model
6B11HV) and clocked in by a custom controller chip. The on-
board microprocessor then converts the data into engineering
units as determined by the channel parameters. In between
conversions, the microprocessor auto zeros the offset and gain
by monitoring the on-board temperature and compensating for
reference drift. Cold junction compensation (CJC) is also
performed at this stage. The 6B11 and 6B11HV use
compensation factors to ensure the highest accuracy possible.
.
.
Figure 2
Models 6B11 and 6B11HV
Range Description (Software Configurable) Accuracy1 (Typical) Accuracy1 (Maximum) Noise (Peak-to-Peak)
±15 mV ±0.03 % FS ±0.06 % FS ±0.02 % FS
±50 mV ±0.015 % FS ±0.04 % FS ±0.01 % FS
±100 mV ±0.0055 % FS ±0.03 % FS ±0.005 % FS
±500 mV ±0.005 % FS ±0.03 % FS ±0.002 % FS
±1 V ±0.005 % FS ±0.03 % FS ±0.005 % FS
±5 V ±0.005 % FS ±0.03 % FS ±0.0015 % FS
±20 mA ±0.008 % FS2 ±0.03 % FS2 ±0.005 % FS
J Thermocouple, 0°C to 760°C ±0.4°C ±0.75°C ±0.14°C
K Thermocouple, 0°C to 1000°C ±0.5°C ±0.75°C ±0.22°C
T Thermocouple, -100°C to +400°C ±0.5°C ±0.75°C ±0.2°C
E Thermocouple, 0°C to +1000°C ±0.5°C ±0.75°C ±0.2°C
R Thermocouple, +500°C to +1750°C ±0.63°C ±1.5°C ±0.3°C
S Thermocouple, +500°C to +1750°C ±0.62°C ±1.5°C ±0.4°C
B Thermocouple, +500°C to +1800°C ±1.2°C ±2.0°C ±0.7°C Accuracy is given for 6B11 and 6B11HV module only. When measuring thermocouple signals, the CJC temperature sensor error should
be added to the module accuracy to compute the system accuracy. The AC1361 CJC temperature sensor is provided on each channel of
the 6B Series backplanes. Does not include the error of the current to voltage input resistor, Model AC1381.
6B11 and 6B11HV Specifications (typical @ +25°C and Vs = +5 V dc)
Description Model 6B11 and 6B11HV
Inputs, Software Selectable
Thermocouple Types J, K, T, E, R, S, B
mV ±15 mV to ±500 mV (Refer to Model Table)
Volt ±1 V; ±5 V
Current Range ±20 mA
Communications
Protocol RS-485
Baud Rates, Software Selectable 300K, 600K, 1.2K, 2.4K. 9.6K, 19.2K
Accuracy
Initial @ +25°C Refer to Model Table
Input Offset vs. Temperature ±0.3µ V/°C
Span vs. Temperature ±3 ppm/°C (±25 ppm/°C, maximum)
Cold Junction Compensation1
Initial Accuracy @ +25°C ±0.25°C (±0.75°C, maximum)
Input Resistance 100 M Ω
Bandwidth, -3 dB 4 Hz
Conversion Rate 9 samples /second
Synchronized Sampling Command Yes
Conversion Time 70 ms maximum
Common-Mode Voltage (CMV)
Input-to-Output and Power
Model 6B11 1500 V rms, continuous
Model 6B11HV 2500 V rms, continuous
Common-Mode Rejection (CMR)
1 k Ω Source Imbalance @ 50/60 Hz 160 dB
Normal Mode Rejection (NMR)
1 k Ω Source Imbalance @ 50/60 Hz 58 dB
Input Protection 240 V rms, continuous
Input Transient Protection ANSI/IEEE C37.90.1-1989
Power Supply
Voltage, Operating +5 V dc ±5%
Voltage, maximum safe limit +6.5 V dc
Current +100 mA
Mechanical Dimensions 2.3" x 3.1" x 0.79"
(58.4 mm x 78.7 mm x 19.1 mm)
Environmental
Temperature Range
Rated Performance -25°C to +85°C
Operating -25°C to +85°C
Storage -40°C to +85°C
Relative Humidity 0 to 95% @ +60°C non-condensing When used with the CJC temperature sensor, model AC1361, provided on each channel of 6B Series backplanes.
Specifications subject to change without notice.
PIN CONFIGURATIONS AND FUNCTIONAL DESCRIPTIONS
Figure 3 . Model 6B Series Module, with pin-out assignments.
Table 1. Pin Function Descriptions—
Figure 4 6B11 & 6B11HV Input Field Connections
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human
body and test equipment and can discharge without detection. Although this product features proprietary ESD
protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges.
Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
OUTLINE DIMENSIONS
Figure 5. Outline Dimensions
